I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
crenel crenelle cornel corneal coronel kernel carnal cornual greenly coronal cranial cornily carinal carnally kernelly coronally cranially granola
crenel coronel trunnel darnel serenely pronely peroneal perineal kernel greenly cornel renal corneal borneol barrenly runnel ronnel terrenely charnel
careen cornea curn carney carnie carny coreign corn carn cornua cornu corny crane crania cranny crone crony screen